# What is General Relativity and how does it relate to astronomy?

General Relativity is Einstein's geometric description of gravity which brings together special relativity and gravity in one consistent set of equations.

Einstein's geometric explanation of gravity, known as general relativity, unifies special relativity and gravity into a single consistent system of equations by describing how the curvature of space and time, also known as spacetime, relates to the energy and momentum of the mass and radiation within it.

It helps us anticipate and comprehend a wide range of astronomical phenomena, including gravitational lensing, black holes, the expanding universe, gravity waves, and more.

This page describes general relativity.

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General relativity is a theory of gravitation that was developed by Albert Einstein. It describes how massive objects deform spacetime, which in turn affects the motion of other objects. In astronomy, general relativity is essential for understanding the behavior of celestial bodies, such as planets, stars, galaxies, and black holes. It explains phenomena like the bending of light around massive objects (gravitational lensing), the gravitational redshift of light from distant objects, the motion of objects in strong gravitational fields, and the dynamics of objects in the universe.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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